[ATM] Over-shot Long. Aberration

[Francis J. O'Reilly]

I'm with Jerry. 1/3 COC MOT cures most ills.

Francis J. O'Reilly
----- Original Message ----- 
From: "Jerry" <wa4guu at verizon.net>
To: "'michael dodge'" <michaeldodge9 at hotmail.com>; <atm at atmlist.net>
Sent: Wednesday, September 30, 2009 6:51 PM
Subject: Re: [ATM] Over-shot Long. Aberration


> Yep it is over cooked.
>
> There are an number of ways to back up.  One would be to use the 1/3 D
> strokes near Center over Center.
>
> Jerry
>
> -----Original Message-----
> From: atm-bounces at atmlist.net [mailto:atm-bounces at atmlist.net] On Behalf 
> Of
> michael dodge
> Sent: Wednesday, September 30, 2009 6:20 PM
> To: atm at atmlist.net
> Subject: [ATM] Over-shot Long. Aberration
>
>
> I'm making my first mirror, Finished polishing, got a pretty nice sphere 
> (I
> think) and started figuring.  I'm using a slitless tester (moving light
> source), all was going well until in dawned on me that I need to double my
> knife edge readings!!!! Duh!!! Now I think I have over shot my "ideal"
> longitudinal abb. by a considerable amount!  What can I do? Here are the
> numbers for my mirror:
>
>
>
> 8" dia.
>
> ROC=89.56
>
> Zone 1 Radius=1.47
>
> Zone 2 Radius=2.60
>
> Zone 3 Radius=3.37
>
> Zone 4 Radius=4.00
>
>
>
> KE Readings on each zone
>
> Z1=.000
>
> Z2=.097
>
> Z3=.130
>
> Z4=.151
>
>
>
> I hope I can fix this, I don't want to continue until I get some advice 
> from
> some veterans.  Thanks guys!
>
> Michael
>
> _________________________________________________________________
> BingT  brings you maps, menus, and reviews organized in one place.   Try 
> it
> now.
> http://www.bing.com/search?q=restaurants&form=MLOGEN&publ=WLHMTAG&crea=TEXT_
> MLOGEN_Core_tagline_local_1x1
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
>